Michelin offers multiple versions of the Cup 2 R with sidewall designations by the vehicle manufacture: MO Mercedes, N0 N1 Porsche, K1, K2 Ferrari TPC SPEC 1156 GM etc…
When purchasing a car set of four tires, choose the version designated for your vehicle if it is available so your performance characteristics match the intent of the vehicle design engineers.
If the OEM set is not available it is acceptable to use a set of the least expensive matching factory designation Cup 2 Rs that also match the size, load and speed rating of your OEM tires.
Michelin doe not recommend mixing manufacturer designations on the same vehicle. When purchasing less than a full set match what is already installed on the vehicle.